<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.obu.edu/calendar/?ai1ec=action~agenda%257Cpage_offset~1%257Ctime_limit~1411725601%257Ccat_ids~18%2C14%2C21>